The two specimens, skins only, available from Oklahoma, are provisionally referred to _primulina_. These are remarkable for the restriction of the color of the underparts and for the intensity of the yellow coloration of the underparts. The specimen from Norman has the color of the underparts entirely absent from the hind legs and not extending posteriorly to the penis. On the chest and lower throat, large spots of color of the upper parts are present and the yellow area of the underparts on the belly is narrower than in any other specimen of _primulina_ examined. The specimen from 8 miles northwest of Stillwater has the color of the underparts only a little less restricted although this color does extend over the inguinal region almost to the knees. The skin of the posterior part of the body of a weasel is available from 10 miles south of Sulphur Springs, Texas. It, likewise, is only provisionally referred to _primulina_. The coloration is about as in the specimens from Oklahoma but the distribution of the color of the underparts cannot be made out. The dark color of the upper parts occurs far westward in animals which otherwise display characters of _longicauda_. Among these intergrades, the larger size of _longicauda_ generally is combined with this dark color. This geographic behavior of the dark color of the upper parts is analogous to the condition described in _M. f. spadix_. Stated in another way, the dark color of the upper parts is the character, of the eastern animal, last to disappear as one goes westward across the Mississippi Valley toward the range of _longicauda_ which is a subspecies of markedly different size, shape of skull, and coloration. Only two of 29 specimens from Kansas show infestation of the frontal sinuses. All four of the specimens from Missouri have the frontal sinuses malformed as do 9 of the 14 from Arkansas examined in this respect. An adult female from Boone County, Iowa, bears the date May 9, 1938, and the annotation by T. G. Scott, "Fox-killed." _Specimens examined._--Total number, 131, arranged alphabetically by states and from north to south by counties in each state. Except as otherwise indicated, specimens are in the University of Kansas, Museum of Natural History. =Arkansas.= _Boone County_: 3 mi. E Bergman, 4[74]; 3 mi. SE Bergman, 1[74]; 3 mi. S Bergman, 1[74]; 3 mi. SW Bergman, 1[74]; 4 mi. SE Bergman, 2[74]; 5 mi. SE Bergman, 1[74]; 4-1/2 mi. SE Bergman, 3[74]; 5 mi. SE Bergman, 1[74]; 5 mi. S Bergman, 2[74]; 5 mi. SW Bergman, 2[74]. _Washington County_: Fayetteville, 1[96]. _Crawford County_: 10 mi. S Winslow, 1. _Sebastian County_: Fort Smith, 1[91].